Jessie J is on course to top the UK single chart with her new song, 'Price Tag' featuring B.O.B.

The singer's track looks set to become the first single to debut at number one after being released on the same day it was played on radio.

Last month, Universal – Jessie J's label – and Sony announced that they had signed up to the On Air, On Sale initiative championed by the Featured Artists' Coalition (FAC).

It is hoped the policy will help stem the problem of illegal file-sharing, FAC member Blur's Dave Rowntree told Gigwise.

Current number one Bruno Mars is likely to fall one place to number two with 'Grenade', according to the Official Charts Company.

Meanwhile, on the album chart, Adele is on course to spend a second week at the top with her second album '21'.

(by Jason Gregory)